Find out how GT-BTX PluS® technology uses extractive distillation to remove sulfur and aromatics from cracked stock gasoline streams to very low levels without hydrotreating the full stream material. This eliminates the octane loss of traditional selective HDS units.

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GT-BTX PluS® is a variation of GT-BTX®, a proven extractive distillation technology that simultaneously removes benzene, toluene, xylene and thiophenic sulfur species from aromatic-containing cracked naphtha. The technology helps produce low-sulfur gasoline that meets the 10 ppm limit of sulfur without a significant loss in octane value.

Another use of GT-BTX PluS® is to generate aromatics for paraxylene production without the requirement of a typical naphtha reformer unit. This is especially attractive for use with feedstocks produced from high-severity fluid catalytic cracking (FCC) operations.

The process is optimally installed on the FCC mid-cut naphtha stream. GT-BTX PluS® removes all thiophenes, and some of the mercaptan-type sulfur species, from the FCC gasoline feed through an extractive process that separates the sulfur plus aromatics from the olefins. This olefin-rich raffinate can then be sent directly to the gasoline pool for blending or to a treating unit to remove the mercaptan-type sulfur compounds before being sent to the gasoline pool. The extract stream is desulfurized by conventional means and can be directly used for petrochemical production instead of recycling to the naphtha reformer.

This document takes an in-depth look at the advantages of GT-BTX PluS® and the benefits provided to refiners.